Spraying apparatus.



F.'F.\BRADLEY.

SPHAYING APPARATUS.

APPLICATION mio ocr. I. 1914.

1,20*,94., Patented Mar.27,1917.

F53 'f Z5 17 j fin J3 m23 @1 [23 Z0 A s /g l FRANKLIN F.` BRADLEY, FCHICAGO, ILLNOS, SS'IGNGR T BRATS'LEY 55 VRGOMAN COMPANY, OF CHICAGO,ILLINOIS, A CRPGRATN @E ILLINOIS.

SPRAYING APEARATU.

To all whom t may concern.'

it known that l, Faxnumn F.' BRAD- LEY, a citizen of the United residingat Chicago, in the county of Cook and State of illinois have invented acertain new and useful improvement in Spraying Apparatus, of Vwhich thefollowing is a full7 clear7 concise and exact description, referencebeing had to the accompanying drawings, forming a part of thisspecification.

lily invention relates to spraying devices and is of particular servicein the formation of spraying devices that are adapted to thedistribution of paint, varnisha etc.

rlhe invention has for one of its objects the provision of a sprayingdevice that is adapted to the production of a spray oi' atomized liquidthat is much more evenly distributed throughout the spray than Washitherto possible with prior devices. ln practising this feature of myinvention l employ a plurality7 say tivo9 substantially parallel collocated spraying nozzles adapted to the production of tu'o sprayswhich vare preferably initially distinct but which, oufing to thecollocation of the nozzlesa are intermingled to eii'ect the desireddistribution of the atomized liquid in that portion of the combinedspray vvhere application of the atomized liquid is to be effected.

The invention has for another of its objects the provision of animproved mechanical construction of spraying nozzles7 and for another ofits objects the provision of improved means taking part in eiiiectingthe discharge of the liquid.

li ivill eXplain my invention more fully by reference to theaccompanying drawing showing preferred embodiments thereof ami in auchFigure l is a side view of a spraying device constructed in accordancewith my invention7 parts being shown in section, the association of thespraying device Xvith the air pressure tank and a source f liquid supplybeing diagrammatically indicated; Fig. 2 is a sectional plan Viewon line2 2 of Fig. 3; Fig. 3 is an illustration similar to a part of theillustration contained in Fig. l but on a larger scale; Fig. 4iis asectional View on line l a of Fig. 3 and Fig. 5 illustrates amodification.

Like parts are indicated by similar characters of reference throughoutthe different gures.

Referring first more particularly to the A Specification of LettersPatent.

Application filed ctober 7, 1914.

Patented Mar. 27, 191'?.

Serial No. 865,487.

construction shown in Fig. l and to the views which illustratecharacteristics that are common to the structures of Figs. l and 5, lhave illustrated an apparatus which includes a pressure tank l that maycontain air having a normal pressure of siXty pounds per square inch.rlhe outlet tube 2 of this air tank is connected by a flexible hose 3with a rigid tube eithat is carried by a suitable handle 5. A tank 6contains the paint7 if'arnish or other liquid (illustrated at 7) whichthe atoinizer of my invention is to diiuse in the form of a spray. Anair inlet tube 8 carried by the tank 6 serves to connect a flexible airhose 9 'sith a rigid tube l0 also carried by the handle (i. fin outlettube il is connected by flexible hose or pipe l2 'with the rigid pipe 13that is also carried by the handle 5. The air pipes l and l() areadapted for communication at their upper ends when the valve le isopened consequent upon depression oi the thumb head lo of the valve la,at which time airis also supplied under pressure to the air pipe lowhich extends to the spray nozzle structure illustinted at 17, theliquid conveying pipe 13 also extending to this structure. i check valve18 is located in the pipe l0 and permits the flou' of air under pressurethrough pipe l0 to the tank 6 for the purpose of forcing liquid fromthis tank through the pipe i8 to the nozzle structure i7. lVhen theapparatus is out of action, at which time the valve l is closed, backpressure of air through the pipe will force the check valve i8 shut sothat there is no iovv of air under pressure through the pipe lll wherebya desired degree of air pressure may be maintained upon the liquid inthe tank 6 to enable the immediate flou7 of liquid from this tank whenthe valve la is reopened. l do not limit myself to the use of ordinarytubing for the air and liquid' conveying ducts.

The nozzle structure which l prefer to employ with the apparatus abovespecifically described forms another part of my invention but equipmentwhich l have specifically described for effecting the discharge ofliquid that is to be sprayed is not to be limited in its association tothe preferred form of nozzle structure. ln accordance With this featureof my invention the nozzle head includes in its formation a block ofmetal 19 'which as tWO substantially parallel bores 2O iro . one end ofthe nozzle head, these bores being i Vin the nozzles 22.

normally closed at the latter end of the nozzlehea'd by separate screwcaps or closures 201, 211 in threaded engagement with the nozzle head toenable them to be cleaned. The liquid lp'ipe 13 communicates with thebore 20 and the air pipe 16 communicateswith the bore 21 whereby liquidand air are respectively supplied to these bores. Two parallelcollocated tubular liquid edueting nozzles Q2, terminating at the frontend of the nozzle head, are passed diametrically or transversely throughthe bore 21 into communication with the boreV 20 whereby liquid may bedischarged from the bore 2O through the nozzles 22 which extendlongitudinally of the nozzle head. Annular spaces 23 surround thenozzles 22 and intervene between the same and the nozzle head 19, thesespaces being sufiiciently limited to enable the air to issue from thebore 21 therethrough with sufficient force irst to draw the liquidthrough the nozzles 22 and thereafter thoroughly atomize the same.

In the form of the invention illustrated in Fig. 5 the liquid tank 6 isreplaced .by

kthe liquid tank or receptacle 24 which is mechanically coupled with thepipe 13 by means of the set screw 25, the pipe 10 and the Vcheck valve18 being omitted in this arrangement. In the structure illustrated inFig. 1 the liquid is not only withdrawn due to the air which is flowingunder pressure through the annular spaces 23 but is also withdrawn dueto the pressure upon the liquid in the tank 6 whereas in the structureof Fig. 7 there is n0 artificial pressure upon the liquid in thereceptacle 24s, total reliance .being placed upon the air flowingthrough the spaces 23 to effect the flow of liquid By means of thenozzle structure described and the parts correlated therewith outwardlyflaring conical streams of atomized liquid are produced. As is wellknown by those skilled in the art the atomized liquid is denser at theaxial portions of the separated parts of thc two conical streams so thatif but one nozzle were used alone the atomized liquid would not issuefrom the apparatus in a well distributed condition. By employing twonozzle structures the conical streams ofatomized liquid merge a suitabledistance therefrom, the particles of the two streams intermingling andbombarding each other to effect a redistribution which is substantiallyeven at any right section of the composite stream.

While I have herein shown and particularly described preferredembodiments of my invention I do not wish to be limited to the precisedetails of construction shown as changes may readily be made withoutdeparting from the spirit of my invention, but having thus described myinvention I claim as new and desire to secure by Letters Patent thefollowing An atomizer provided with a nozzle head having twosubstantially parallel bores arranged transversely of the nozzle headand each extending to one end thereof, one of these bores being forcommunication with a source of liquid to be sprayed and the other forcommunication with a source of air under pressure; a separate screw capfor each of these bores at the end of the nozzle head to which such boreextends and in threaded engagement therewith; and a nozzle tubeextending longitudinally of the nozzle head and terminating` at thefront end of the nozzle head and extending through the latter bore intocommunication with the other bore, there being space at the exit end ofthe nozzle tube intervening between this tube and the nozzle head, thisspace affording communication between the air conveying bore and theexterior of thc nozzle head.

In witness whereof, I hereunto subscribe my name this 30th day ofSeptember A. D.,

FRANKLIN F. BRADLEY. Witnesses:

ESTHER MCLOUGHLIN, FRED J. HUnTz.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. C.

